Refining-engine for paper-pulp.



N0. 818,039. PATBNTED APR. 17, 19GB1 M. A. MILLS.

REPINING ENGRE FOR PAPER PULP.

Prummel ruw Arima. 1901.

SHEETS-BREST l.

mi www PATENTE!) APR. 17, 1906.

M. A. MILLS. RBFINING ENGINE FOB. PAEB PULP.

APPLIGATIX FILB PB.23.190L

INVENTOR mum mma Aomqa `nnunnuu J No. 818.039. PATENTBD APR. l?, 19(36Q M. A. MXLLS.

REFINING ENGINE FOR PAPER PULP. APPLIQHIUR FILED n.23` 1991.

8 SHEETS-SHEET 3.

6 Y 23 a 19 1J' la' i9 e@ 34 69 62de" YATENI'BD APB.. 17, 1906.

Ml A. MILLS. REFINING BNGNE PQR PAPER PULP.

No. 818,039. PATENTE!) APR. 17, 1906. M. A. MILLS.

REFINING ENGINE POR PAPER PULP.

APPLIOATIOH FILED APR-23. 1901.

20 8 SHEETS-SHEET 6.

20 Z5 27- 5l-g 29 26 solo LWIEAJ'TOR mM MLM.

No. 818,039. PATENTED APR. 17, 1906. M. A. MILLS.

REPINING ENGINE FDR PAPER PULP.

uPLloATxon rus 5.23. um`

a annu-salam" s PATBNTBD APR. 17, 1906.`

M. A. MILLS. REFINING ENGINE FOR PAPER PULP.

LPPLIOATIOH IILED APB. 23. 1901.

8 SHEETS-9H BET IA i jaws/Lto; J/Vm iw/z,

MLWHH. M C

PATENTED APR. 17, 1906.

M. A. MILLS. REFINING ENGINE FOR PAPER PULP.

PPLIGATOI FILED APB, 23. l.

8 BH BITS-SHEET 8.

I I Il!! UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented April 17, 1906.

Aopllcation llorl April 23. 1901. Serial No. 57,080.

To all whom, t nung concern.-

Bf it. known that I, MELVIN A. MILLS, a citizen of the United States, residing at Lowrence, in the county of Essex and State of Massachusetts, have invented certain new und useful Improvements in Refining-Engines for Paper-Pulp, and I lo hereby de rim-e the followin to be e full, clear, und exnrt description o the invention, such as will enable others skilled in the art to which it appertsins to make and use the saine.

This invention relates to nper-1nsking nou-hinerv, and has special re erence to that type of reiinintr ninchines or engines coininutili known in the nrt, and es eciallv among paper manufacturers, as ordanl engines, designed for grinding the pui?` or paper stuff, while to the saine time nia ing provision for the elimination therefrom of `nich foreign substances as nails, pieces of nietnl, and the like which are sometimes rerried with the ing engine.

To this end the invention primeriljr contemplates certain neit ments in that type of Jordan engines disvlosed in and covered bv my former attent, .\'o. 5241.605. dated April 2T, i897, sald type ol' Jordon engine comprising in its general organization n tapering shell or onse provided upon the interior thereof with a series of ledger knives or blades and a correspondlowly-ta Y cred Jordan lug or roll rotating insi e of 1 1c shell and a so carrying c plurslitv of exterior knives or blades cof'ipersting with those of thc shell to effect the necessary grinding or merel-ation of the paper-pnlpln a more definite aspect the invention ln'ondly contenu lates a novel mounti and arrangement of parts Wherebv an gjustment of the'Jordan plug or roll is permitted within the stationarv inclosing shell or case to compensate for the weer incident to the. grinding or macerating operation, without, however, shifting or otherwise disturbing the relntively fixed driving-gear for the plugshaft.

A further object of the invent-ion is to provide a novel arrangement oi driving-gear for the plugshaft to insure a minimum amount of tru-tion in the running thereof, while at the same time permitting of the. endwise movement or adjustment of the plug-shaft.

Anotler object in this connection is to so arrange the bearings of die driving-gear that pulp into thtl refining or grind and useful improveferred form of in dotted lines Y the comprising simple and e fective means for taking the thrust of the s haft as the seme may rotate in either direction.

Vith these and many other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination, and arrangement of parts hereinefter more fully described, illustrated, and claimed.

The essential features of the invention involved in the objects shove s ecied are necessarily susce tibio to a wir e range of modiiication wit tout departin from the spirit or scope of the invention; ut for illustrative purposes there is shown in the accompnnymg drawings several practical embodiments of the invention.

In the drmvings, Fmre 1 is a side eleva.- tion of a refining or Jort an engine embodying the improvements cont omplated by the present invention. Fig. 2 is a vertical longitudinal sectional view of the entire engine. Fig. 3 is an enlarged sectional view of the predriving-gear, the view showing how a dynamo or other ovverbe directly cou led to theY riving quill or s eeve to provide fiir the direct transmission of power thereto instead of through the medium of the pulley and belt. F' 4 is an enlarged det-eil sectional viewol' a pre erred form of du lex or double-actv thrusibearutilize: in connection wi thxgend of ping-shaft opposite the slirlable'coupling thereof with the quill or sleeve of the drivinggear. Fig. 5 is an enlarged detail sectional view of a. portion of the roller-bearing and oppositel -arranged thrust plates or disks of the doub e-act-ing or duplex be which constitutes the thrustsbearing for one end of the Jordan-plug shaft.' 6 is an enlarged rsgmentary elevation of a section of shuft ma ating device' the roller-bearing which is interposed between said thrust plates or disks, the loose, bearing ring being omitted to expose the mount of the radial rollers. Fig. 7 is 'a vertical ongitudinal sectional view of the complete engine, showing an obvious modification of the present invention, including a simple form of single actin" thrustbearing for one end of the Jordan-plug shaft and plain roller-bearings for the driving quill or sleeve having the power connection therewith. Fig. 8 is an enlar fed sectional view in detail, showing one of t e original forms of driving-gear employed in the development of the invention. Fig. 9 is a plan view of the bearings and the driving t uill or sleeve supgorted thereby of the modification shown in ig. 8, the view omitting other parts. Fig. l is a detail sectional view on the line l() 10 of F' 8. Fi l1 is an enlarged detail sectiona view o another modication of the adjustable thrustbearing for the Jordanlug shaft, said bearing employing original iiirms of the invention with reference to that part of the invention. Fig. 12 is an end view of the form of thrust-bearing disclosed in Fig'. 1l. Fig. 13 is a vertical longitudinal sectional view of another modification of the invention, disclosing a reverse arrangement from that shown in Figs. 2 and '-that is, the location of the drivin -gear at or contiguous to the discharging end ol the engine and the thrust-bearing located beyond the opposite end. 14 is an enlarged plan view, partly in section, of a modification of the adjusting means for the thrust-bearing which is disclosed in connection with the construction shown in 13. Fig. is a cross-sectional view on the line 15 15 of Fig. 14. Fig. 16 is an eiid view of the construction shown in llake numerals of reference designate corresponding parts in each of the views of the drawi Us.

As a ready explained, the improvements I contcm lated by the present invention are applica le particularly to the ty )e of Jordan engine disc osed in niv patent a oresaid, No. 581.605. and essentially comprising in its organization an exterior tapering shell l, provided upon the interior thereof with a seriesof ltine-itudinally-arrangcil knives or blades 2 andan interior correspondingly-tapered Jordan plug or roll 3, rot-ating inside of the shell and also carrying a plurality of longitudinallyarranged knives or blades 4, cooperating with those of the stationary' shell to effect a grinding or niaceration of the pulp as it passes through the machine. There is a working space rovided between the exterior of the conic rotat lug and the inner wall of the inclosingmsiel l, which space is practically occupied bv the stationary knives or blades 2 of the shell and t-he rotating knives 4 working in proximity thereto,whereby the l l r essential repects substantiall proper grindin or macerating action may be carried out in t e manner peculiar to the Jordan en me. In the type of Jordan engine being (ascribed the inclosing shell 1 thereof is shown as )rovided with an annular chamber 5 at the eed or receiving end thereof, said annular chamber being either an integral part of the shell or separately attached thereto, but in either event providing an annular enlargement for the receiving end of the shell, which forms a refuse chamber or trap for the collection and dis osa] of such substances as nails and the li e that frequently How into the engine and are liable to in'ure the knives on the plug or its inclosing s ell. The said chamber or trap 5 obviates this, and the same is referably provided with a suital)ly-covere(l)(lischarge-pocket 6, from which the foreign substances may be readily removed. The said chamber or trap 5 is also designed to have connected therewith the usual inlet or inlets 7 for the paper-pulp or stuff to be treated within the engine.

The integral or conical inclosing shell 1 is referabl closed at the receiving end thereof y a hea -plate or cap 8, ltted with a stuffing-box 9 for the horizontally-arranged rotating plug-shaft 10, extending longitudinally through the shell and havn'. the Jordan plug or roll rigidly mounted t ereon so as to rotate therewith. At the end o posite the closing-head 8 the shell 1 has bo ted or otherwise suitably fitted thereto an offset chambered head 11, which is oset from the base or wide end of the shell be ond the correspondingly wide end of the p ug to constitute a discharge or delivery chamber which receives the ground or macerated paper stuff and permits of the ready discharge thereof through the outlet-pi e 12 in communication with the interior c amber of the head 11. The said head l1 is also equipped with a stuffing-box 13, which is in precise alinement with the oppositely-located box 9 to provide for an accurate centering of the shaft 10.

The construction so far described is in all the same as that covere or coniprehende by my former patent, No. 581,605, and inasmuch as the present invention has special reference to the driving-gear for the lug-shaft', as well as to the means for the engwise ad'ustmen t thereof in connection with its t ustbearing, these parts of the invention will now be particularly referred to. First, with reference to the driving-gear for the plug-shaft it is understood that an essential feature thereof resides in the construction and arrangement of parts whereby the plug-shaft niaIy be positively driven at all times and the ongitudinal or endwise adjustment thereof ermitted without disturbin the relatively ed position of an part o the driving-gear. Various forms of ving-gear may obviously be em- IOC IlO

IIO

ployed for eiectin this necessary result, but a few practical em odiments of this part of the invention are shown in the drawings. 'In all of those different embodiments there is preserved one element-namely, that of a non-shiftable rotary driving quil or sleeve 14, having the power connection therewith and having slidably coupled or feathered therein one end of the plug-shaft 10, referably that end projecting beyond the fded orV receivin end of the shell 1 of the en `ne. The sldable interlocking connection o the plu -shaft l0 with' the rotating or drivin. ui or sleeve 14 may be elected b any o t e well-known mechanical ex edients, it only bein necessary that the p ug-shaft be so couple with the drivin tively rotate therewith, wul e at the same time being free to slide within the quill to admit of the longitudinal movement or adjusts ment of the ug-shaft and the Jordan'ping carried there y. A simple form of coupling or feathered connection is shown on the drawings and consists in providing the quill or sleeve 14 upon the inner side thereof withlongitudinally-errati ed keyways 15, which are slidably enga e disposed keys or eathers 16, provided upon the plug-shaft 10, said construction'neces sarily providing for the rotation of the lugshat with the uill or sleeve and the eny Wise movement or a justment of the shaft therein without disturbing the relative position of the quill or sleeve.

The quill or sleeve 14 constitutes the driving element for directly transferring motion to the shaft 10 of the Jordan plug, and, as already indicated, any suitable ower connection may be rovided for rotating the quill or sleeve. In t e preferred embodiments of the in veu tion this is accomplished by mountinga drivingpulley 17 centrali upon the quill or sleeve 14, the hub 18 o said piulley being made fast upon the central this cned collar portion 19 of the quill and extending entirely across the interval between the oppositely-located boerin 20, disposed upon opposite sides of the s'ving-pulley and constitutiug bearing-supports for the journal ends of the driving-quill. By reason of the hub of the pulley extending across the interval between the o positely-located bearings 20 the driving-quil is held to rotation in 'a' fixed plane and is prevented from longitudinal movement, although the other parts of the driving-gear are so constructed as to col guiar shou ders 29, which, in connection with o lrate in securing these results. Though d driving-pulley I7 is the preferred meats for communicating motion to the quill it will of course be understood that ot er means may be empio ed-such, for instance, as the employment o a wer-shaft 2l, hav- 'ing keys 22, which may e engaged with the interior keyways of the driving-quill within the end portion opposite the end of the quill ulll as to posi-n by the longitudinally-- Y the receiving the Jordan-plug shaft, said powen shaft being driven in any suitable manner. but when used in this way preferably being the shaft of an electric motor or d nemo thus providing for the direct coup ing of electric power with the Jordan engine should it be desired to drive the same in that Way. This suggested modification in power connection is indicated in dotted lines in Fig. 3 of the drawin Althouglilsin its referred construction the quill 14 is provide with a central reinforcingcollar portion 19, the seme may obviously be made plain throughout, as shown in theruodified construction of Fig. 7 of theV drawings;

Sci

quill 14 is provided at opposite sides of t e central portion, usually adapted for the mounting of the uiley thereon, with the journal ends 23, wliich turn within the oppositeiy-locsted bearings 20. These bearings for the opposite end portions or 'ournals of the drive-quill are preferably of t e antifriction type to insure an easy runnin of the quill and are carried at the upper en s of the bearin -standards 24, arising from the base B of t e engine. In the practical construction of the machine or engine the bearings as an entirety essentially consist of the bearingboxes 25, provided at the upper ends of the standards 24, and roller-bearings, housed Within said boxes 25 about the journal ends This construction is shown 1 23 of the quill. in a simple form Vin Fig. of the drawin connection Witlra driving-quill of uni crm dimensions throughout, although various modifications may be resorted to to provide for prepari housin the roller-bearings and retaining t Ve journa ends of the quill within the same. In an improved form of the engine embodying the construction of quill shown in Fig. 3 of the drawings there may be employed a Wear or contact bushing 2'?, sleeved upon the journal ends 23 of the Lil and having the roller-hea 26 cucire the same and bearing direct y thereon, sa; roller-bearings being retained in position preferably throu h the medium of retainingcollars 28, suitab y held upon the extremities of the journal ortions 23 of the uili.

An original orm of the quill an its mounting in connection with the roller-bearings is shown in F' 8 of the drawings, but is of substantiall t e same construction as already describe with theV exception of the central reinforcin -collar 19, having pronounced anthe terminal retaining-collars 28, serve to pro j rly confine Vthe roller-bearings within oxcs 25. In said Fig. 8 ofthe drawings there is also shown associated with the bearing-boxes 25 adjusting or take-up devices 30, essentially comprising slidably-mounted wedges 31 and adjusting-screws 32 therefor to provide for the vertical adjustment of the IIO bearin -boxes to insure the proper truing up ofthe ordan-pluv shaft, this expedient being disclosed in my fbrmer patent, N o. 581,605, aforesaid.

To effect a delicate and minute endwise movement or adjustment of the shaft and the Jordan plug carried thereby, as well as to absorb the thrust of the shaft during the operation of the engine, there is emplo ed in all forms of the invention an adjustab e thrustbearing 34, which receives the end of the shaft opposite its slidable connection with the driving-quill and is located beyond and contiguous to the wide or discharging end of the engine, although the arrangement described may be reversed without de arting fromthe s irit of the invention. roadly speaking, t e thrust-bearing 34 is provided t erein with suitable bearing devices, preferably of the antifriction type, to take the thrust of the shaft and is adjusted, as occasion may require, through the medium of suitable adjusting mechanism. In all of the practical forms of` the invention the thrust- )earing referred to includes a bearing box or shell 35, having a slide or slides 36 working in guides 37 of a stationary guiding-support 3S, arranged above the base B beyond one end of the engine. The said adjustable or slidable bearing-box is also provided with one or more projecting nuts 39, receiving a suitably-operated adjusting-screw 40, which when manipulated provides for moving the entire thrust-bearing 34 in a direction to effect the endwise or longitudinal adjustment of the Jordan-plug shaft. Various modifications of the guidin support and the adjusting means for the bearing box or shell 35 of the thrust-bearing may be resorted to, as shown in the different views of the drawings, and in addition to the features described the slidable box 35 ma)v also be vertically movu ble and have assoclated therewith an adjusting or take-up device 30` (see Fig. 4,) similar tothe device 30 already described and utilized for truing the parts, as suggested in my former patent.

In the simple and original forms of the thrust-bearing illustrated in Figs. 7 and l l of the drawings the bearing devices within the box or shell 35 only provided for taking the thrust of the Jordan-plug shaft in one direction. and these forms of the invention will be hereinafter again referred to: but the more recent and more ractical constructions from the standpoint o efficienc)v involve the proform of thrust-beari in its im roved aspect is shown in detail in ig. 4 of tlie drawings.

Referring particularly to the construction of duplex bearing as shown in Fig. 4 of the drawings, it will be observed that the bearing box or shell 35 is provided within one end thereof with an enlarged annular counterbored portion 42, constituting an annular bearing-chamber for the reception and working therein ofthe double-actingor duplex bearing device 43, which constitutes the thrustbearing proper. The annular counterbored portion 42 necessarily forms at the side edges thereof the inner and outer annular abutment-shoulders 44 and 45, respectively, with which cooperate the oppositcly-disposed parallel thrust plates or disks 46 and 47, constituting a part of the device 43 and having interposed therebetween a roller-bearing 48. The said spaced parallel thrust plates or disks 46 and 47 are snu ly but loosely fitted upon a shaft sleeve or iiushing 49, which is secured u on a reduced portion 50 at one end of the rel uced journal 51, formed at the end of the Jordan-plug shaft arranged within the adjustable terminal bearing 34 therefor. Immediately beyond the reduced portion 50, upon which is sustained the thrust-bearin pro er, the. Jordan-plug shaft is provided wit the bolt-stud terminal 53, receiving thereon the nuts 54, holding in lace a collar and a liber or equivalent was er 56, interposed between said collar and the shoulder at the base of the stud 53, said parts constituting a fastening means for securing the thrust-bearing as an entirety properly in place uprcn the reduced portion 5() of the shaft. he roller-bearing 48 of the bearin device includes a supporting-collar 57, fitte upon the shaft sleeve or bushin l 49 and carrying a circular series of radiaJy-ext'ending antifriction tapering rollers 58, whose outer spindle extremities are journaled in the outer bearing-collar 59 and which rollers are rctained in proper working position centrally .between the side edges of the inner and outer collars 57 and 59 by a retaining-band 60, encircling the outer collar 59. ln thc interval between the collars 57 and 59, what might be pro )erly termed the bearing-frame for the rollers 5S, and u )on opposite sides of said rollers, are arrange the loose bearing-rings 61, having inner beveled faces 62, confor-filing to the ta er of the rollers 58, and havingr their outer sies rejecting sli htly beyond the side edges o the bearingame, so as to engage with and fit the channels 63 in the opposing faces of the oppositely-located thrust plates or disks 46 and 47.

In the im roved form of bearing described it is prefera le to associate therewith an adjusting device for taking up wear or delicately setting the parts of the thrust-bearing during the o eratlon of the engine. A simple means or accomplishing this consists IOO lIO

IZO

in the employment of a tubular exteriorlythreaded adjusting-nut 64, working in the threaded opening 65 at one end of the box or shell 35 and adapted to bear at its inner end against the outer plate or disk 4?, said adjusting-nut 64 beiiw hold perfectly fast after adustrnent through the medium of a check or ook nut 66, arranged on the exterior thereof and workin against the adjacent end of the box or she 35.

It will be obvious from the construction described that according to the direction of thrust of the Jordan-plug shaft the plates 46 and 47 will become alternately fast and loose, and thus permit of a perfectly free action of the thrust-bearing and the easing up of the thrust.

ln connection with the thrustbearing proper, termed the duplex-boerin device, 43, a. roller-bearing 67 is prefer-ab?Y housed within the shell or box 35 about the journal portion 51 of the shaft, and to assist in holding the journal of the shaft properly centered Within the bearing-box 35 and also to assist in holdin the roller-bearin 67 in place there is preerably fitted upon t e shaft a shaft-collar 68, having a flange 69 extendin into one end of the box or shell 35.

Ihe simple and original form of thrustbearing disclosed in Fig. Tessentially involves a thrust plate or disk 70, carried by the shaft Il) and disposed at one side of a roller-bear ing 71 of a substantially similar construction to the roller-bearing 48 previously described, but which co crates Vonly with a single thrust plate or dis 70, and hence prov vides means simply for taking the thrust of the J orden-plu shaft in one direction. Another original orm of thrust-bearing which onlyr provides for taking the thrust of the plugvshaft in one direction is illustrated in igs. l1 and 12 of the drawings. in this form of the invention there is combined with the bearin which takes the thrust of the shaft a roilgerebearing 26, encircling the terminal of the shaft extending into the bearing-box 35, said roller-bearing being arranged to cooperate with a sleeve or bushing 72, made fast upon the shaft 1i) and constituting a shoulder at one end, against which abuts the inner one of a pair of loose thrust disks or plates 73 and 74, respectively. These loose thrust disks or plates 73 and 'I4 are disposed Within the enlar ed annular counter cred portion 42 of theearing-box 35, which counterbored ortion constitutes an annular bearing-chamber for the thrustbearing pro er, and the outer one,73,of the said thrust disks or plates is designed to bear against the abutment-head 75, arranged at the outer end of the bearin -box 35l and constituting either an integra or separate part thereof. The said plate or disk is also provided at the inner side thereof with a plurality of concentric ball-races 76, having wenn i plates 77 in their bases and accommodating E therein a plurality of antifriction bearin i balls 78, which also project outside of t e plane of the races 76 and contact with the wear-plate i9 at one side of the inner thrust plate or disk 24. 0f course this construetion may be reversed without departing ,l from the spirit of the invention; but in either i aspect thereof the outer thrust-plate 73 becomes fast against the abutment head or shoulder when the thrust of the shaft is imposed thereon, thus leaving the other thrust plate or disk-free to be carried about Y with the shaft against the antifriction bearingballs. At their peripheral edges the l thrust plates or disks 73 and 74 are preferably provided with loosely-overlapping flanges 80, and said plates ma also be loosely cou led together by a cou ing device 81, I suc i as indicated in dotted es, and which, while preventing undue separation of the l plates, at the same time admits of the action I above described. A fastening device 82 at the extreme tip of the shaft 10 serves to hold the parts of the bear' g pro rly assembled within the bearing box or shlel.

In the embodiment of the invention suggested in Fig. 13 of the draw' s the drivingi gear is arranged in close lproximity to the discharging end of the she l, and thus laces the power in closer relation to the p ug to be driven than is possible by the reverse arrangement already described. In this modication the thrust-bearing 34 is necessarily located beyond the feeding end of the engine, and in connection with this arrangement of the thrust-bearing there is illustrated a rnodied form of adjusting means which may VYhe 'associated therewith to effect the ionftudinal or endwise adjustment of the sha t. The suggested modification of the adjusting means or mechanism involves the provision of the bearin -box 35 at opposite sides thereof with the t eaded openings 83 receiving therein the oppositely-located adjusting-screws 84, journaled at their outer ends in a bearing-bracket 85, offset from one end of the bearing-stand 86 and carryin thereon the pinions 87. These pinions nies with a common operatingegear, mounted on the inner end portion o a short o ratingshat 89. This operating-shaft is 5:0 journaled in a bearing 90 of the bracket 85 land carries a hand-wheel 92 for the operator. The construction of isrn described provides a very positive and reliable means for effecting a uniform and even adjustment of the thrust-bearing.

carrying out the invention various other modifications and changes in the form, proportion, and minor details of construction may he resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described the invention, what the adjusting mechan.

is claimed as new, and desired to be secured by Letters Patent, is-

1. A refining-engine comprising a shell. a plug in said shell, a shaft rigidly attached to sai plug, a driving-pulley having its axis in alinement with the shaft, independent fixed bearings for the pulley arranged concentrically to the shaft, the pulley being journnled in said bearings, said shaft bein arranged slidably Within the pulley but he d to turn therewith, and means for adjusting the shaft longitudinally, substantially as set forth.

2. A refining-engine comprising a shell, a u in said shell, a shaft rigidly attached to P15 sai plug, a driving-pulley having its axis 1n alinement with said shaft, two independent fixed bearin s for the pulley, one arranged on each side ofgthe same concentrieally to the shaft, the pulley being journaled in said bearin s, means for connecting the lshaft to the pu ley for a rotation therewith but free longitudinal movement within the. same, and means for adjusting said shaft longitudinally, substantially as described.

3 A refining-engine comprising a shell, a plu in said shell, a shaft rigidly attached to sairplug, a driving-pullejY having its axis in alinement with said shaft, two independent fixed bearin s for the pulley, one arranged on each side oV the same concentrically to thtI shaft, a sleeve rigidly connected to the pulley and having its ends extended on each side of the same and turning in the fixed bearings. l

the said shaft being extended into said sleeve and connect-ed to it for )ositive rotation but longitudinally adjustable within the same, and means for imparting an endwise adjustment to the shaft, substantially as described.

4. A refining-engine comprising u shell, a. plu in said shell, a shaft rigidly attached to sai plug, a driving-pulley iaving its axis in alinement with sa1d shaft, two independent fixed supports for said pulley provided with roller-bearings, one of said supports heilig arran ed on each side of the pulley, a sleeve rigi ly connected to the pulley and having its ends extended on each side of the same and turning in said roller-bearings, the said shaft being extended into said sleeve and connected to it for positive rotation, but longitudinally adjustable within the same, and means for imparting an endwise adj ustment. to the shaft, substantially as described.

5. In an engine substantially as described, the combination of a shell, a shaft passing through the shell and having a plug rieidly attached to the shaft and rotatable within the shell, a pulley for driving the shaft arranged concentricallv thereto. and a fixed caring supporting the pulley and receiving the lateral pull and strain of its belt independently of the shaft, said shaft being extended concentrically within the pulley and connected to it for a positive rotation but free longitudinal adjustment, substantially as described.

t5. A refining-engine comprising a bed-plate having fixed bearings and a thrust-bearin a shell on said bedlate, a lug in said shel a shaft for said p ug, and) having one end mounted in said thrust-bearing, and a ulley having a sleeve extending beyond eac side thereof and mounted in the fixed bearings, the said sleeve having the other end of the shaft slidably inserted therein, but held to turn therewith, as set forth.

7. In an engine of the class described, the combination with the shell and the rotating plug therein, of the plug-shaft, driving-gear havin an operative connection with said shaft ir turning the same while permitting a longitudinal movement thereof, and adjusting means for efl'eeting endwise movement of the shaft..

8. In an engine of the class described, the combination with the shell and the rotating plug therein, of the nlug-shaft, driving-gear lixedly arranged and havin an operative conection with one end of sai shaft, a thrustbearing for the opposite end of the shaft, and shaft-adjusting means associated with said thrust-bearing.

Si. In an engine of the class described, the combination with the shell and the rotating plug therein, of the plug-shaft rejecting beyond op iosite ends of the shellldriving-gear arranged bevond one end of the slielland having a rotating quill slidably receiving one end of the pl Lig-shaft, and also interloeked therewith, a thrust-bearing receiving the opposite end of said shaft, and adjusting means ass0- eiated with said thrust-bearin for effecting endwise adjustment of the sha t and the plug carried thereby.

10. In an engine of the class described, the combination with the shell and the rotating plug therein, of the lug-shaft, a suitably-rotated driving-quill avin bearing-supports at both ends, said quill sliably receivin one end of the shaft and also interlocked t erewith, a thrust-bearing receiving the opposite end of said shaft, a nd adjusting means associated with said thrust-bearing for effecting endwise adjustment of the shaft.

ll [n an engine of the class described, the combination with the shell and the rotatin plug therein, of the plug-shaft, axially-aline spaced roller bearings, a driving q uill or s eeve having journa ends turning 1n said roller-bearings, said quill slidably receiving one end of the plug-shaft and interlocked therewith, a pulley fitted centrali u on the quill between said bearings, andy adjusting means cooperating with said shaft to effect an endwise adjustment thereof and the plug carried thereby.

12. In an e 'ne of the class described, the combination with the shell and the plug, of the IIO plug-shaft, e driving-gear operatively' conr combination with the shell, the plug, and the nected with one end of the shaft, e stationery drivingeer for the plushaft, of a dlipiex guidingsupport, a thrust-bearingsl'idably or doub e-ecting thrust caring, comprising mounted u on said support end receiving thc means for simlarly bearing the thrust of the 5 end of the s ft opposite the driving-gear; and shaft in either direction. 25 adjusting mechanism for sliding the thrust- I 16. In an engine of the class described the boerin upon its sup ort. i combination with the shell the plu and the 13. n an engine o the class described, the drivingear for the plug-shaft, of t e duplex combination with the sheli and the plug havi or doub e-acting thrust-bearing comprisin io ing e shaft projecting exterior to the shell, i ineens for similarly bearing the thrust of the 30 driving-gear for the shaft, and a thrust-heer- J shaft in either direction, and adjusting meching receiving the shaft and comprising means anism for lon itudinally adjusting the thrustfor bearing the thrust of the she t in either dibearing to eect an endwise edJustrnent 01 rection. the shaft. 15 14. In an engine of the ciass described, the In testimony whereof I efx my signature 35 combination with the shell, and the lug havin presence of two witnesses. ing o. shaft, of driving-gear for the s aft, and i MELVIN A. MILLS. a duplex or doubie-acting thrust-bearing re- Witnesses: ceiving the shaft. j HENRY E. COOPER. 2o 15. In an engine of the class described, the I E. M. SHUSTER. 

